I helped out with this event today, pretty interesting afternoon it made too, Central St. Martin's being a new creative space and the gallery there giving a free display of end-of-year works by students.
The event was "paper based" with lots of the public discussing the history and community of King's Cross Central and the coordinators gathering all suggestions and cut & pasting the huge wall printout as the day went on. Rebecca Ross was coordinating the event and is on the faculty of CSM, specialising in urban history and communications. She has my email and I have offered to help with the staging/review/release of updates to the Wikipedia article, this will probably take a week or two.
I took some photos and there were some photographers with the larger stage of the event, so hopefully those will make their way to Commons later. See https://commons.wikimedia.org/wiki/Category:Editathon_in_King%27s_Cross_Cent.... I took a little time out to interview Rebecca, and I am thinking of shaping this up into a Signpost article, along the lines of how an independent event like this can empower communities to change the way Wikipedia might represent their local area, including members of the public who do not want to edit Wikipedia for various reasons.
Fae